Administrator

I would recommend using Disk Utilities (Applications/Utilities/Disk Utility) to repair permissions. Over time and with each installation, I've found these can be off. If you are looking for a tool to clean up your Mac, I highly recommend CleanMyMac 2. I've used it for years and it does a great job. I use it more to free up disk space, removing files that I no longer need.

Genius

In addition to using Disk Utilities to repair utilities, you can also verify and repair the HD itself. I repair permissions and the disc occasionally on my 2010 MBP and it seems to help.

I also recommend CleanMyMac as a handy tool. I also use Onyx (free) to periodically run clean up and diagnostic checks. It's a bit more complicated than CleanMyMac but I only use a few of its basic features.